diff options
| author | Peng Ma <peng.ma@nxp.com> | 2020-02-27 12:28:41 +0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-03-02 14:56:22 +0530 |
| commit | 3e0ca3c38dc2ff5424eefa01a3a91cc9c0f65f5a (patch) | |
| tree | 4d3737e4e113369258f1d538d01f818e454359fe /drivers/dma/fsl-dpaa2-qdma | |
| parent | 667b9251440b762ebc8cd3348a6e6ab29401bb97 (diff) | |
| download | linux-3e0ca3c38dc2ff5424eefa01a3a91cc9c0f65f5a.tar.bz2 | |
dmaengine: fsl-dpaa2-qdma: Adding shutdown hook
We need to ensure DMA engine could be stopped in order for kexec
to start the next kernel.
So add the shutdown operation support.
Signed-off-by: Peng Ma <peng.ma@nxp.com>
Link: https://lore.kernel.org/r/20200227042841.18358-1-peng.ma@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/fsl-dpaa2-qdma')
| -rw-r--r-- | drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c | 17 | ||||
| -rw-r--r-- | drivers/dma/fsl-dpaa2-qdma/dpdmai.c | 21 | ||||
| -rw-r--r-- | drivers/dma/fsl-dpaa2-qdma/dpdmai.h | 2 |
3 files changed, 40 insertions, 0 deletions
diff --git a/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c b/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c index c70a7965f140..fabbbb90b2c7 100644 --- a/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c +++ b/drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c @@ -790,6 +790,22 @@ static int dpaa2_qdma_remove(struct fsl_mc_device *ls_dev) return 0; } +static void dpaa2_qdma_shutdown(struct fsl_mc_device *ls_dev) +{ + struct dpaa2_qdma_engine *dpaa2_qdma; + struct dpaa2_qdma_priv *priv; + struct device *dev; + + dev = &ls_dev->dev; + priv = dev_get_drvdata(dev); + dpaa2_qdma = priv->dpaa2_qdma; + + dpdmai_disable(priv->mc_io, 0, ls_dev->mc_handle); + dpaa2_dpdmai_dpio_unbind(priv); + dpdmai_close(priv->mc_io, 0, ls_dev->mc_handle); + dpdmai_destroy(priv->mc_io, 0, ls_dev->mc_handle); +} + static const struct fsl_mc_device_id dpaa2_qdma_id_table[] = { { .vendor = FSL_MC_VENDOR_FREESCALE, @@ -805,6 +821,7 @@ static struct fsl_mc_driver dpaa2_qdma_driver = { }, .probe = dpaa2_qdma_probe, .remove = dpaa2_qdma_remove, + .shutdown = dpaa2_qdma_shutdown, .match_id_table = dpaa2_qdma_id_table }; diff --git a/drivers/dma/fsl-dpaa2-qdma/dpdmai.c b/drivers/dma/fsl-dpaa2-qdma/dpdmai.c index f8d22115154a..878662aaa1c2 100644 --- a/drivers/dma/fsl-dpaa2-qdma/dpdmai.c +++ b/drivers/dma/fsl-dpaa2-qdma/dpdmai.c @@ -160,6 +160,27 @@ int dpdmai_create(struct fsl_mc_io *mc_io, u32 cmd_flags, } /** + * dpdmai_destroy() - Destroy the DPDMAI object and release all its resources. + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPDMAI object + * + * Return: '0' on Success; error code otherwise. + */ +int dpdmai_destroy(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token) +{ + struct fsl_mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_DESTROY, + cmd_flags, token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpdmai_destroy); + +/** * dpdmai_enable() - Enable the DPDMAI, allow sending and receiving frames. * @mc_io: Pointer to MC portal's I/O object * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' diff --git a/drivers/dma/fsl-dpaa2-qdma/dpdmai.h b/drivers/dma/fsl-dpaa2-qdma/dpdmai.h index 6d785093da8e..b13b9bf0c003 100644 --- a/drivers/dma/fsl-dpaa2-qdma/dpdmai.h +++ b/drivers/dma/fsl-dpaa2-qdma/dpdmai.h @@ -18,6 +18,7 @@ #define DPDMAI_CMDID_CLOSE DPDMAI_CMDID_FORMAT(0x800) #define DPDMAI_CMDID_OPEN DPDMAI_CMDID_FORMAT(0x80E) #define DPDMAI_CMDID_CREATE DPDMAI_CMDID_FORMAT(0x90E) +#define DPDMAI_CMDID_DESTROY DPDMAI_CMDID_FORMAT(0x900) #define DPDMAI_CMDID_ENABLE DPDMAI_CMDID_FORMAT(0x002) #define DPDMAI_CMDID_DISABLE DPDMAI_CMDID_FORMAT(0x003) @@ -160,6 +161,7 @@ struct dpdmai_rx_queue_attr { int dpdmai_open(struct fsl_mc_io *mc_io, u32 cmd_flags, int dpdmai_id, u16 *token); int dpdmai_close(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token); +int dpdmai_destroy(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token); int dpdmai_create(struct fsl_mc_io *mc_io, u32 cmd_flags, const struct dpdmai_cfg *cfg, u16 *token); int dpdmai_enable(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token); |